Clutch



MUM W m 2 SHEETS-SHEET l.

E. w. SOHLMAN.

CLUTCH. FILED MAR.-13, I922.

Feb. '20, 1923.

Feb. 20, L923. 1,446,218. E. w-. SOHLMAN.

CLUTCH. FILED MAR. I3. 1922. Z SHEETS-SHEET 2.

20 .Z/ t 49 Z2 25 I Patented Feb. 20, 1923.

stares- PATENT CLUTCH.

Application filed March 13, 1922. Serial No. 543,358.

Z (ll! whom it may concern:

Be it known that I, ESKTL W. "SoHLMAN, a citizen of the United States,residing at Charleston, in the county of Kitsap and State of lVashington', have invented certain new and useful Improvements in Clutches, of which the following is a specification.

This invention relates to clutches, and more particularly to centrifugally controlled clutches for rotatable machinery.

An object of the invention is the provi sion of a friction clutch by means of which a rotating part may be driven at a substantially constant rate of speed. The clutch elements are slid'ably mounted on the ro tating part and are attached, to weights which are thrown outwardly by centrifugal force. Suitable means are provided for counteracting the outward movement of the clutch elements whereby the en agement of the clutch elements with the drive shaft is varied in proportion to the speed of the machine.

In the present application, There illustrated the invention applied to a toy phonograph, but it is apparent that it may be employed in'other places where a substantially constant speed is desired.

In the accompanying drawings. I have shown one embodiment of the invention. In this showing: I

Figure 1 is a front elevation of a phonograph showing the invention applied,

Figure 2 is a plan view,

Figure 3 is a vertical sectional view on 1 line 3-3 of Figure 1,

Figure f is a bottom plan view of the turntable,

Figure 5 is a detail sectiona. view on line 5-5 of Figure 1, a

Figure 6 is a perspective view of the governor, and 1 Figure 7 is a detail sectional view on line 7-7 of Figure 1.

Referring to the drawings, the reference numeral 1 designates a base having a pair of standards 2 and secured to the upper surface. zontally as at 4- and secured to the stand ard 2 forming a horizontal surface or support. The front face of the standard 3 is provided with a recess 5. A shaft 6 is mounted in the standard 3 and projects above the upper face of the horizontal portion 4. A friction roller 7 is mounted on this. shaft in the recess ;5 Thisfroller is adapted means 25.

The standard 3 is extended horito engage a friction wheel 8, mounted on a shaft 9,supported in suitable bearings in i the supports 2 and 3. The shaft is provided with a crank or handle 10. i H

A turntable'll is mounted on the shaftli,

andthis turntable is adapted to receive the usual record 12. The under side of the turntable is provided with suitable governing mechanism to maintain a constant rate of revolution. As shown, a plurality of guides 13 are secured to the turntable and the governor mechanism 'consistsofa plurality of radial "arms 14;, slidably mounted in the guides. The inner ends of these arms are secured to frictioncluteh members 15.

The

inner faces of the clutch members are provided with semi-circular recesses 16. adapted to receive the shaft 6. These clutch members .are surrounded by an elastic member 17,

which tends to hold them in engagement with the shaft 6. The outer ends of the arms 18 areprovided with weights 18.

The combined amplifier and sound box comprises a cylindrical metallic member 19, which issecured to an arm 20, formed by card board or other relatively stiif material. As shown. this arm comprises a pair of substantially parallel portions which pass around and are loosely supported by a pin 21 arranged on the top of the standard 2.

Suitable fastening members 22 pass through the ends of the arm and the adjacent sides of the member19. A needle holder 24 is mounted in the periphery of the sound box and secured therein by suitable fastening This needle holder is provided with a recess for the reception of a needle 26 which is retained in position by means of a set screw 27.

. To operatethe phonograph the shaft 9 is turned by hand by means of crank 10. The governor maintains the turntable at a constant speed at all times. The weights 11.8 are moved outwardly by centrifugal force and tend. to draw the clutch members away from the shaft The clutch rnemloeas lion ever, are maintained in partial engagement with the shaft by the elastic member L? which exerts a constant and uniform pressure on the shaft to maintain a, uniforin speed. g p The construction of the sound box 19 eliminates the necessity of an amplifier or horn and furnishes a clear resonant tone.

Itis to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in theshape, size, and arrangement of parts maybe resorted to without departing from the spirit of the invention or the scope of the subj oined claims.

I claim:

1. In a centrifugal clutch,- a shaft, a driven member, a plurality of U-shaped supporting devices secured to said member, arms slidably mounted therein, weights secured to the outer ends of said arms, clutch elements carried by the inner ends of said arms,and meansfor exerting a constant inward pressure on said clutch elements to normally maintain .them in engagement with said shaft. 1

2. in a centrifugal clutch, a shaft, a driven memb 12, and meansfor connecting said mem ber to said shaft, said means comprising guides secured to said member, arms slidably mounted in said guides, weights secured to the outerends of said arms,'the inner ends of said arms being offset, clutch elements mounted on the offset portionsof said arms, and means for exerting a constant inward pressure on said clutch elements to maintain' them engagement with said shaft.

3. In a centrifugal clutch, a shaft, a driven member, and means for connecting said tic member surrounding said clutch elements to exert a constant inward pressure thereon. ln testlmony whereof I my s gnature in presence of two witnesses'. EsK L WERNER soHL An I Witnesses:

HARRY COURTRIGHT, l3. W. Ro n 

